. . "ents are turned on;FIG. 8, comprised of FIGS. 8A and 8B, is a flow chart showing the operation sequence of a camera;FIG. 9 is a flow chart showing an algorithm for automatically selecting the distance measuring point;FIGS. 10A and 10B are flow charts for detecting the visual axis;FIG. 11 is comprised of FIGS. 11A to 11C showing a flow chart for calibrating the visual axis;FIGS. 12A to 12E are view" . . .